KR20060121665A - Camera module - Google Patents

Abstract

A camera module is provided to reduce the time required to fix a barrel and a base to decrease the operating time and cost of the camera module. A camera module includes a plate(1) on which an image pickup device is set, a first holder(2) for holding a lens(25) and a second holder(5) combined with the first holder using a screw to support the first holder and fixed onto the plate. The focal length of the camera module is adjusted by the degree to which the first holder and the second holder are combined with each other with the screw. A recess(31) for receiving external light is formed over the first holder and the second holder, and a light-hardened adhesive(30) is injected into the recess to fix the first holder and the second holder.

Description

Camera Module {CAMERA MODULE}

1 is a cross-sectional view of FIG. 2 showing an embodiment of the present invention, where (a) is an enlarged cross-sectional view taken along the line A-A, and (b) is a partially enlarged cross-sectional view taken along the line B-B.

Fig. 2 is a plan view showing one embodiment of the present invention.

3 is a front view of FIG. 2.

4 is a perspective view of FIG. 2 (not shown in the figure).

Fig. 5 is a perspective view showing barrel 2 (joint support for the annular elastic body 4 and not shown in the drawing) of the bolt 2 in Figs. 1 to 4, wherein (a) is an oblique view from above; (b) is the figure which inverted top and bottom of (a).

Fig. 6 is a perspective view showing the pedestal 5 (not shown in the drawings for the nut thread 53 in Fig. 1) in Figs. 1 to 4, wherein (a) is an oblique view from above, and (b) is a It is a figure which inverted up and down.

Fig. 7 is a perspective view showing the fixing surface of the substrate 1 and the pedestal 5, where (a) shows the fixing surface 55 of the pedestal 5 (the illustration of the nut part 53 for the nut is omitted), and (b) shows the substrate 1 ( The fixing surface 15 of the photographing element 11 or the circuit elements 12 to 14 is omitted.

8 is a cross-sectional view showing a state before screwing the barrel 2 to the pedestal 5 fixed to the substrate 1;

9 is a sectional view showing a conventional example.

* Explanation of symbols for main parts of drawings *

One… Substrate 15... Fixed surface of board 1

16, 17... Release part of the fixed surface 15

2… Barrel (example of first supporting member) 26... Thread for Bolt

30... Photocurable adhesive 31. Recess

5... Pedestal (example of second supporting member) 53. Thread for Nut

55... Fixed surface 56 of base 5... Stopper part

60... Adhesive 61... Adhesive layer

62, 63... Adhesive fillet 7... Support member

The present invention relates to a camera module for use in a cellular phone, a portable terminal, or the like.

In the conventional camera module, for example, as shown in Fig. 9, a circuit board 103 (hereinafter simply referred to as a substrate) 103 provided with the photographing element 101, a barrel 107 on which lenses 105 and 105 are supported, a barrel 107 and a screw And the base 113 fixed to the substrate 103 by the adhesives 109 and 111, together with the support of the barrel 107, and by adjusting the screwing amount of the barrel 107 and the base 113 between the lens 105, 105 and the photographing element 101. The distance (that is, the focal length of the lenses 105 and 105) was adjusted (see Patent Document 1, for example).

The fixing of the barrel 107 and the base 113 after adjustment was performed by inject | pouring an adhesive agent into the screw engaging part 115 of the barrel 107 and the base 113, for example (refer patent document 2).

Patent Document 1: Japanese Unexamined Patent Publication No. 2004-297282

Patent Document 2: Japanese Unexamined Patent Publication No. 2003-172859

However, in the above conventional example, since the thermosetting adhesive was used as the adhesive to be injected into the screw engaging portion 115 to fix the barrel 107 and the pedestal 113, the curing time is long (for example, 30 minutes to 60 minutes). There was a problem that this lengthened, resulting in a cost increase.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and the cost reduction can be achieved by shortening the time required for fixing the barrel (an example of the first support member) and the pedestal (an example of the second support member). An object of the present invention is to provide a camera module.

The invention of claim 1 further comprises: a substrate provided with a photographing element, a first support member on which a lens is supported, and a second support member fixed on a substrate while supporting the first support member by screwing with the first support member. A camera module having a screw coupling amount between the first support member and the second support member, wherein the focal length of the lens can be adjusted, the first support member and the second support member being provided on at least one of the first support member and the second support member; A concave portion is formed across the support member and capable of receiving external light, and the first support member and the second support member are fixed by the photocurable adhesive injected into the concave portion.

The invention of claim 2 is the invention of claim 1, wherein the concave portion extends to the screw coupling portion of the first support member and the second support member, and the photocurable adhesive injected into the concave portion includes the first support member and the first support member. It is characterized in that it has a high viscosity that does not penetrate the screw engaging portion of the support member.

According to a third aspect of the present invention, in the invention of the second aspect, the first support member includes a bolt screw portion having a bolt screw formed on an outer circumferential surface of the cylindrical body, and an upper plate for closing an upper end opening of the bolt thread portion. The second support member includes a nut threaded portion formed on a cylindrical inner circumferential surface having a nut thread formed with a bolt screw and a screw threaded nut, wherein the recessed portion is formed at equal intervals along the circumferential direction at the periphery of the upper plate. And a recess, which extends to the nut portion of the second support member.

The invention of claim 4 further comprises a substrate provided with a photographing element, a first support member on which a lens is supported, and a second support member fixed on a substrate while supporting the first support member by screwing with the first support member. And a camera module capable of adjusting the focal length of the lens by screwing amounts of the first support member and the second support member, wherein at least one of the first support member and the second support member is molded from a light transmissive material, and The first support member and the second support member are fixed by a photocurable adhesive injected into the screw coupling portion of the first support member and the second support member.

(Example)

1 to 8 show one embodiment of the present invention, in which 1 is a circuit board (hereinafter simply referred to as a substrate), 2 is a barrel as an example of a first support member, 4 is an elastic member. As an example, the annular elastic body 5 is a base as an example of a 2nd support member.

The barrel 2 and the base 5 support the lenses 25 and 25 and form a support member 7 fixed on the substrate 1.

As shown in Fig. 7B, the substrate 1 is formed of a synthetic resin in a substantially square plank shape, and is formed in a shape in which the four corners are cut out.

In the center portion of the upper surface of the substrate 1, as shown in Fig. 1A, photographing elements 11 and other circuit elements 12 to 14 electrically connected by wiring patterns (not shown in the drawing) are provided. Terminals for external connection (not shown in the drawings) are provided on the side surfaces and the lower surfaces of the substrate 1.

In the peripheral portion of the upper surface of the substrate 1, a fixing surface 15 as shown in Fig. 7B is formed.

The fixed surface 15 is an approximately square annular shape, and is formed in the shape which inclined the four corners by 45 degree inclination angle.

At the four corners of the fixing surface 15 and at the center of one side, there are formed 16 to 16 and 17 wider portions than the corresponding portions of the fixing surface 55 of the pedestal 5 (to be described later).

Barrel 2 is formed of a synthetic resin, and has a barrel body 21 formed in a substantially cylindrical shape as shown in Fig. 5 (a) and (b), and an upper plate 22 which closes the upper opening of the barrel body 21 and protrudes an outer rim. In this upper plate 22, an aperture hole 23 is formed.

Two lenses 25 and 25 are supported inside the barrel body 21, and a bolt thread 26 having bolt screws on the outer circumferential surface of the barrel body 21 is formed.

On the lower end opening side of the barrel body 21, an engagement step 28 for engaging and supporting the annular elastic body 4 is formed.

At the periphery of the upper plate 22, as shown in Fig. 5 (a) and (b), four recesses 31 are formed at equal intervals along the circumferential direction, and this recess 31 is the upper part of the bolt thread 26 for the barrel body 21. Extends to The recess 31 is for accommodating the photocurable adhesive 30 injected from the outside, and the photocurable adhesive 30 to be injected has a high viscosity such that it does not penetrate the screw coupling portion of the barrel 2 and the pedestal 5, It has the property of hardening by visible light for a short time (for example, around 10 seconds).

The annular elastic body 4 is provided with the engaging part 41 and the contact part 42 integrally formed in the outer periphery edge by the elastic material like synthetic rubber.

The engaging portion 41 is formed in an approximately pentagonal cross section so as to be engageable with the engaging step portion 28 of the barrel body 21, and the contact portion 42 is formed in an approximately semicircular shape.

The pedestal 5 is formed of synthetic resin, and has an upper pedestal 51 formed in a substantially cylindrical shape as shown in Figs. 6 (a) and 6 (b), and a substantially quadrangular lower pedestal provided so as to be continuous under the upper pedestal 51. 52 is provided.

The upper pedestal 51 is provided with a nut thread 53 having a nut for screwing on its cylindrical inner circumferential surface, and the nut screw of the nut thread 53 is screwable with the bolt screw of the bolt thread 26 of the barrel body 21. Formed.

Inside the connecting portion of the upper pedestal 51 and the lower pedestal 52, a substantially annular stopper portion 56 which restricts the movement limit position in the screw travel direction of the bolt threaded portion 26 for the barrel 2 is formed to protrude.

Cutting grooves 57 are formed in the central portion of one side wall of the lower pedestal 52, and the cutting grooves 57 open at the upper side, the lower side, and the outer side.

The lower surface of the lower pedestal 52 is a fixed surface 55 with the substrate 1, and this fixed surface 55 is an approximately square annular as shown in Fig. 7 (a), and the four corners are inclined at 45 degrees of inclination angle. In addition, it is formed in the shape which dug the center of one side.

The fixed surface 55 of the base 5 and the fixed surface 15 of the board | substrate 1 are being fixed by the contact bonding layer 61 formed by the adhesive agent 60, and the adhesive fillets 62 and 63.

Next, the assembly of the camera module will be described.

(1) Adhesive 60 is applied to at least one of the fixing surface 15 of the substrate 1 and the fixing surface 55 of the pedestal 5 on which the imaging elements 11 and the circuit elements 12 to 14 are mounted, and the center axis and the upper side of the light receiving surface of the imaging element 11 While the center axis of the pedestal 51 is aligned, the pedestal 5 is placed on the substrate 1 by bringing the fixing surface 15 and the fixing surface 55 into close contact with the adhesive 60 therebetween. The adhesive 60 may be any of thermosetting, room temperature curing and photocuring.

By curing the adhesive 60, an adhesive layer 61 for fixing both sides is formed in the fixing surface 15 of the substrate 1 facing the fixing surface 55 of the pedestal 5, and a predetermined portion continuous to the adhesive layer 61 is formed. To form both sides of the adhesive fillets 62 to 62 and 63.

The adhesive fillet 62 fixes the release part 16 of the fixing surface 15 of the board | substrate 1, and the part adjacent to the release part 16 in the outer side wall of the lower pedestal 52 as shown in FIG.1 (b).

As shown in the enlarged view of Fig. 1 (a), the adhesive fillet 63 fixes the release portion 17 of the fixing surface 15 of the substrate 1 and the portion adjacent to the release portion 17 on the outer wall of the lower pedestal 52. .

As described above, since the substrate 1 and the pedestal 5 are fixed by the adhesive layers 61 and the adhesive fillets 62 to 62 and 63, the length and width of the substrate 1 are about 6 mm, and the thickness of the plate on the side wall of the lower pedestal 52 (that is, the fixing is fixed). Even in a small camera module having a width of approximately 55 mm), a desired fixed strength can be obtained. For example, even when warpage occurs on the fixing surface 55 during molding of the pedestal 5 and the adhesive is hard to stick, the desired fixing strength can be obtained by the adhesive fillets 62 to 62 and 63.

(2) Subsequently, as shown in Fig. 5 (a) and (b), after engaging the engaging portion 41 of the annular elastic body 4 with the engaging step portion 28 of the barrel 2, the annular elastic body 4 is supported. As shown in (a), screw the bolt thread 26 of the barrel 2 to the thread 53 of the nut 5 of the pedestal 5.

At this time, the center axes of the lenses 25 and 25 coincide with the center axis of the upper pedestal 51, and the annular elastic body 4 is pressed between the tip of the barrel 2 and the stopper portion 56 of the pedestal 5 and elastically deformed. The barrel 2 and the pedestal 5 are formed in advance so that the focal length of the lens is adjusted, and the number of threads of the bolt screw portion 20 and the nut screw portion 53 is set.

For this reason, when adjusting the screwing amount of the bolt thread part 26 and the nut thread part 53 and focusing the lens 25, 25 on the imaging element 11, the front end part of the barrel 2 and the base 5 of the barrel 2 in the state which the annular elastic body 4 was elastically deformed. It is inserted between the stoppers 56, and the elastic force strengthens the friction between the bolt 26 and the nut 53, thereby increasing the tightening force by screwing the barrel 2 and the pedestal 5, thereby increasing the spacing between the screw joints (gap). The shift of the focal lengths of the lenses 25 and 25 can be prevented.

In addition, it is sufficient to insert the annular elastic body 4 between the tip of the barrel 2 and the stopper 56 of the pedestal 5, so that the size can be avoided as in the conventional example of inserting the pressure-contacting member and the leaf spring. have.

(3) Subsequently, a photocurable adhesive 30 is injected into the recesses 31 to 31 of the barrel 2 to fix the barrel 2 and the pedestal 5 as shown in Fig. 1 (a).

At this time, the photocurable adhesive 30 has a high viscosity such that the photocurable adhesive 30 does not penetrate the threaded portions of the barrel 2 and the pedestal 5, so that the photocurable adhesive 30 is formed from the recess 31 by the bolt thread 26 and the nut screw 53. Barrier 2 and pedestal 5 can be fixed by curing the photocurable adhesive 30 in a short time (for example, after 10 seconds) by ultraviolet rays or visible light because it does not penetrate into the gap between the screws of the screw.

The camera module assembled as described above is mounted on a wiring circuit board such as a mobile phone or a mobile terminal via the camera module connector or directly.

In the above embodiment, the case where four concave portions accommodating the photocurable adhesive agent were formed at equal intervals along the circumferential direction in the upper peripheral portion of the first support member was described. However, the present invention is not limited to one. It can also be used in the case of or in the case where a plurality of pieces other than four are formed at the same or different intervals along the circumferential direction.

In the said embodiment, although the case where the recessed part which accommodates a photocurable adhesive agent was formed in the 1st support member was demonstrated, this invention is not limited to this, When formed in the 2nd support member or the 1st support member and It can be used also when formed in the 2nd support member.

In the above embodiment, the case where the concave portion for accommodating the photocurable adhesive agent is extended to the screw engaging portions of the first and second support members in order to increase the fixed area, but the present invention is not limited thereto. It can be used also when it does not extend to the screw engagement part of a 1st, 2nd support member.

In the above embodiment, the case where the first and second support members are formed of a material that does not transmit light (for example, synthetic resin) has been described. However, the present invention is not limited thereto, and the first and second support members are not limited thereto. It can be used also when at least one of the members is molded from a light transmitting material.

In this case, since external light can be irradiated to the screw joints of the first and second support members without the recesses, the formation of the recesses is omitted, and a photocurable adhesive is injected into the screw joints, so that the first support member and the 2 Support member can be fixed.

In the above embodiment, the elastic member for preventing the shift of the focal length of the lens is formed of an annular elastic body having an engaging portion and a contact portion, with respect to the camera module in which the engaging portion is coupled to and supported by the engaging step portion of the first support member. Although the present invention is not limited to this, the present invention is not limited thereto, and elastically deforms by screwing the first supporting member and the second supporting member, and the fastening force by the screwing of the first supporting member and the second supporting member is used as the elastic force. It can also be used also in the camera module which enlarged and prevented the shift of the focal length of a lens.

For example, a camera in which the elastic member is an annular elastic body having a circular cross section (for example, an O-ring), and a part of the side of the first supporting member is coupled to the annular concave groove formed in the front end surface of the first supporting member when screwed. It can also be used in a module.

Or it can be used also for the camera module provided with the screw part and the annular elastic body part in which the 1st support member was integrally formed, and shape the screw part from the material with high rigidity, and shape | molded the annular elastic body part with the elastic material as an elastic member. In this case, only the screwing of the first support member and the second support member can automatically assemble the elastic member (annular elastic body portion) to simplify the assembly process.

In the above embodiment, the camera module in which the elastic member is inserted between the first support member and the second support member has been described. However, the present invention is not limited to this, but between the first support member and the second support member. It can also be used in a camera module (for example, the camera module which is the conventional example of FIG. 9) which does not insert an elastic member in the inside.

In the above embodiment, in order to increase the fixing strength of the substrate and the second support member, all four corners of the square annular are formed to be inclined at an inclination angle of 45 degrees in order to increase the fixed strength of the substrate and the second support member. Although one camera module has been described, the present invention is not limited thereto, and four corners of the fixing surface of the substrate are formed in an arc shape or a right angle shape, and four corners of the second support member are formed in an arc shape. It can also be used in the camera module in which the release surface of the fixing surface of the 2nd support member was formed in the four corners of the fixing surface wider than the corresponding part.

In the above embodiment, the fixing surface of the substrate and the second supporting member is formed in a substantially square ring shape, and the area of the fixing surface of the second supporting member is centered on four corners and one side of the fixing surface of the substrate. Although the camera module which formed the wide mold release part and formed the adhesive fillet in these mold release parts was demonstrated, this invention is not limited to this, The corresponding part of the fixing surface of a 2nd support member on a part of the fixing surface on a board | substrate. It can also be used also in the camera module which formed the more wide area | region and formed the adhesive fillet in this release part.

For example, as shown by the dashed-dotted line in FIG. 7, by forming cutting grooves 57 on each side wall of the lower pedestal 52, the four corners of the fixing surface 15 of the substrate 1 and the fixing surface of the lower pedestal 52 correspond to the center of each side. It can also be used also in the camera module which formed the release part which has area larger than the part to which it forms, and provided the adhesive fillet in these release parts.

Alternatively, the cutting grooves 57 formed on one side wall of the lower pedestal 52 are omitted from the embodiment shown by the solid line in FIG. 7, and the release portions 16 to 16 are formed only at the four corners of the fixing surface 15 of the substrate 1 to form the adhesive fillets 62 to 62. In the case of forming, the four corners of the fixing surface of the pedestal have the same shape as the fixing surface of the substrate, and can also be used in a camera module in which a release portion is formed only at the center of each side of the fixing surface of the substrate to form an adhesive fillet.

According to the first aspect of the present invention, there is provided a camera module including a substrate, a first support member, and a second support member, wherein at least one of the first support member and the second support member spans both sides and receives light from external light. Since the first support member and the second support member were fixed with the photocurable adhesive injected into the recesses as possible, the first support member and the second after adjusting the screwing amount of the first support member and the second support member. The fixing strength of the supporting member can be increased and can be fixed in a short time without heating.

According to the invention of claim 2, in the invention of claim 1, the recess extends to the screw engaging portion of the first supporting member and the second supporting member so that the photocurable adhesive injected into the recess does not enter the screw engaging portion. Since the high viscosity of the grade is provided, the fixing area of the first supporting member and the second supporting member by the concave portion can be increased to increase the fixing strength.

In the invention according to claim 3, in the invention according to claim 2, the first support member includes a threaded portion for the bolt and the upper plate, the second support member includes a threaded portion for the nut, and the concave portions are spaced at the periphery of the upper plate. Since it is made of a plurality of recesses formed, the fixing strength of the first support member and the second support member can be increased stably.

According to a fourth aspect of the present invention, there is provided a camera module including a substrate, a first support member, and a second support member, wherein at least one of the first support member and the second support member is formed of a light transmitting material, and the first support member is formed. And the first support member and the second support member are fixed by the photocurable adhesive injected into the screw coupling portion of the second support member, so that a recess for collecting the adhesive may be formed to fix the first support member and the second support member. no need.

Claims (4)

A substrate 1 on which the photographing element 11 is installed, A first support member 2 on which the lenses 25 and 25 are supported, The first support member 2 is screwed with the first support member 2 to support the first support member 2, and the second support member 5 fixed on the substrate 1 is provided. Equipped, A camera module capable of adjusting the focal lengths of the lenses 25 and 25 by the screwing amount of the first support member 2 and the second support member 5, At least one of the first support member 2 and the second support member 5 is concave across the first support member 2 and the second support member 5 and capable of receiving external light. Form part 31, Fixing the first support member 2 and the second support member 5 by means of a photocurable adhesive 30 injected into the recess 31. Camera module. The method of claim 1, The concave portion 31 extends to the screw coupling portion of the first support member 2 and the second support member 5, The photocurable adhesive 30 injected into the recess 31 has a high viscosity such that it does not penetrate into the screw engagement portion of the first support member 2 and the second support member 5. Thing Camera module. The method of claim 2, The 1st support member 2 is equipped with the bolt thread part 26 in which the bolt screw was formed in the outer peripheral surface of the cylindrical body, and the upper plate 22 which closes the upper end opening part of this bolt thread part 26. and, The second support member 5 is provided with a screw thread part 53 on a cylindrical inner circumferential surface, on which a screw thread for a nut is screwed with the bolt screw of the bolt thread part 26. The recessed part 31 consists of the some recessed part 31 formed in the peripheral part of the upper board 22 at equal intervals along the circumferential direction, The recess 31 extends to the threaded portion 53 for the nut of the second support member 5. Camera module. A substrate 1 on which the photographing element 11 is installed, A first support member 2 on which the lenses 25 and 25 are supported, The first support member 2 is screwed with the first support member 2 to support the first support member 2, and the second support member 5 fixed on the substrate 1 is provided. Equipped, A camera module capable of adjusting the focal lengths of the lenses 25 and 25 by the screwing amount of the first support member 2 and the second support member 5, At least one of the first supporting member 2 and the second supporting member 5 is formed of a light transmitting material, Fixing the first support member 2 and the second support member 5 with a photocurable adhesive injected into the screw coupling portion of the first support member 2 and the second support member 5 Camera module.

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